QWidget Semi-transparent Background Color: Difference between revisions
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= QWidget Semi-transparent Background Color = | = QWidget Semi-transparent Background Color = | ||
This code snippet shows how to make the background color of | This code snippet shows how to make the background color of [http://doc.qt.io/qt-5.0/qtwidgets/qwidget.html QWidget] semi-transparent by overloading [http://doc.qt.io/qt-5.0/qtwidgets/qwidget.html#paintEvent paintEvent()]. | ||
* Declare overload of paintEvent | * Declare overload of paintEvent | ||
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</code> | </code> | ||
The code snippet is inspired by solution proposed by '''Antonio Di Monaco''' at | The code snippet is inspired by solution proposed by '''Antonio Di Monaco''' at [http://developer.qt.nokia.com/forums/viewthread/1488 this forum thread]. | ||
== See Also == | == See Also == | ||
[http://wiki.qt.io/How_to_Change_the_Background_Color_of_QWidget How to Change the Background Color of QWidget] | |||
Revision as of 15:15, 4 March 2015
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QWidget Semi-transparent Background Color
This code snippet shows how to make the background color of QWidget semi-transparent by overloading paintEvent().
- Declare overload of paintEvent
.h file
protected:
//overload from QWidget
void paintEvent(QPaintEvent* event);
- Implement the overload of paintEvent
.cpp file
void MyWidget::paintEvent(QPaintEvent* /*event*/)
{
QColor backgroundColor = palette().light().color();
backgroundColor.setAlpha(200);
QPainter customPainter(this);
customPainter.fillRect(rect(),backgroundColor);
}
The code snippet is inspired by solution proposed by Antonio Di Monaco at this forum thread.